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But Mr and Mrs Cameron were pictured swimming in the sea on both Monday and Tuesday - for almost an HOUR each time.

The water warning, which blamed the sea contamination on heavy rain, was sent out via a Safer Seas Service app, run by Surfers Against Sewage.

Surfers were warned against hitting the waters for potentially serious health risks for up to 48 hours.

Clearly the Cameron's did not get the memo - or are not users of the beachgoer app.

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The couple appeared to be enjoying themselves in the water

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The Camerons were seemingly unaware of what was lurking in the water

Surfers Against Sewage campaign manager David Smith said: "There could be anything from a small health risk such as skin, eye, ear, or throat infections to much more serious conditions such as E.coli or hepatitis which can be present within raw sewage.

"It can also contain a bacteria resistance to antibiotics which once in the gut means you could have a life-long rejection to them.

"The Camerons could have been at risk - it depends when they went out and what type of spills there were.

The Camerons could have been at risk

David Smith

"There have been two recent incidents in Polzeath. The World Health Organisation recommends that the public should leave the scene for between 24-48 hours before all of the powerful pollution has removed itself.

"There is potential that if the Camerons were swimming within the time frames of a spillage that they might well be at risk.

"We know there is a risk to people when there is a spillage in an area - and they are at much at risk as anyone else."

The SAS app works as a free alert system that is used by beachgoers to see what the real-time situation is at their destination.

Mr Smith said the alerts about contamination come straight from water companies and are immediately issued via the app to let users know when raw sewage is going into the sea.

He added that a surfer ingests "almost 200ml of seawater per surf".

He said: "If surfers are using polluted waters the chance of them becoming ill raises significantly. It's no surprise that supporters continue to regularly report illnesses to SAS."

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The alerts were issued before and after the Camerons had finished their swimming sessions

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Mr Cameron visits Cornwall every year with his family

Sewage is normally thoroughly treated before it is pumped out to sea as clean water.

But in event of excess water - which could be due to heavy downpours or short sharp downpours - the system reaches capacity and it overflows.

While in Cornwall, Mr Cameron was also spotting wearing ear plugs in an apparent attempt to avoid an ear infection.

The Prime Minister was forced to interrupt his holiday in Portugal to seek medical attention after contracting otitis - an infection also known as 'swimmer's ear'.

His family have visited Polzeath every year since he entered Number 10 in 2010.